The Egyptian cobra is most commonly found in North Africa. Its venom is so deadly that it can kill a full-grown elephant in three hours -- or a person in about 15 minutes, according to wildlife experts. The venom destroys nerve tissue and causes paralysis and death due to respiratory failure.

Scholars believe the Egyptian cobra was known in ancient times as the asp. Legend has it that Cleopatra, the ancient Egyptian queen, used an asp to commit suicide.